So guys as the title suggests my Macbook pro mid-2012 13" shows the battery as not available and the battery indicator on the side shows the 3rd led solid green just one led! I have no idea why my battery died and why 1 led is solid green. I ran the Apple Hardware test and got back nothing. I am currently running an extended test to see if I get anything. If only someone could tell me what the battery indicator means when 1 led is lit I would extremely appreciate it. I have opened the macbook and disconnected the battery connector which shuts of the led but as soon as I reconnect the connector the led comes back on. If you guys could help I would truly appreciate it and thank you in advance.